package com.itheima.controller.impl;

import com.itheima.controller.IStudentController;
import com.itheima.domain.Student;
import com.itheima.factory.Factroy;
import com.itheima.service.IStudentService;

import java.util.ArrayList;
import java.util.Scanner;

public class StudentControllerImpl implements IStudentController {
    private Scanner sc = new Scanner(System.in);
    private IStudentService service = Factroy.getStudentService();

    @Override
    public void start() {
        loop:
        while (true) {
            System.out.println("--------欢迎来到 <学生> 管理系统--------");
            System.out.println("请输入您的选择: 1.添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出学生系统");

            String choice = sc.next();
            switch (choice) {
                case "1":
                    // System.out.println("新增学生");
                    add();

                    break;
                case "2":
                    //System.out.println("删除学生");
                    delte();
                    break;
                case "3":
                    //System.out.println("修改学生");
                    update();
                    break;
                case "4":
                    // System.out.println("查看学生");
                    findAll();
                    break;
                case "5":
                    //break loop;
                    return;

                default:
                    System.out.println("输入有误");
                    break;
            }
        }
    }

    @Override
    public void add() {
        String sid = null;
        while (true) {
            System.out.println("输入学号");
            sid = sc.next();
            boolean exist = service.isExist(sid);
            if (exist) {
                System.out.println("已经存在,请重新输入");
            } else {
                break;
            }
        }
        Student student = getStudentInfo(sid);
        service.add(student);
        System.out.println("添加成功");
    }

    @Override
    public void delte() {
        String sid = getSid();
        service.delte(sid);
        System.out.println("删除成功");
    }

    @Override
    public void update() {
        String sid = getSid();
        Student newStu = getStudentInfo(sid);
        service.update(sid,newStu);
        System.out.println("修改成功");
    }

    @Override
    public void findAll() {
        ArrayList<Student> list = service.findAll();
        if(list==null||list.size()==0){
            System.out.println("没有数据,请先添加");
            return;
        }
        //不为null 有数据 展示数据
        System.out.println("学号\t姓名\t年龄\t生日");
        for (int i = 0; i < list.size(); i++) {
            Student student = list.get(i);
            if (student != null) {
                System.out.println(student.getSid() + "\t" + student.getName() + "\t" + student.getAge() + "岁\t" + student.getBirthday());
            }
        }

    }

    private Student getStudentInfo(String sid) {

        System.out.println("输入姓名");
        String name = sc.next();
        System.out.println("输入年龄");
        int age = sc.nextInt();
        System.out.println("输入生日");
        String birthday = sc.next();
        Student student = new Student(sid, name, age, birthday);

        return student;
    }
    private final String getSid() {
        String sid = null;
        while (true) {
            System.out.println("输入学号");
            sid = sc.next();
            boolean exist = service.isExist(sid);
            if(exist){
                //删除
                break;
            }else{
                System.out.println("不存在请重新输入");
            }
        }
        return sid;
    }
}
